Write the Laplace equation for two-dimensional conduction heat transfer through a homogeneous, isotropic material that has constant thermal conductivity.
What will be an ideal response?
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The air in your classroom has
A) mass. B) weight. C) energy. D) all of the above E) none of the above
A proton has a total energy of 2.5 × 10?10 J. How fast is it moving? (mp = 1.67 × 10?27 kg)
A. 0.90c B. 0.80c C. 0.70c D. 0.60c E. 0.40c
Which planetary fact(s) is(are) explained by the solar nebula theory?
a. The orbits are all approximately in the same plane b. The orbits are all in the same direction c. Jovian planets are mostly H and He d. Terrestrial planets are mostly rock and iron e. All of the other choices are correct.
Simple harmonic oscillations can be modeled by the projection of circular motion at constant angular velocity onto a diameter of the circle. When this is done, the analog along the diameter of the acceleration of the particle executing simple harmonic motion is
a. the displacement from the center of the diameter of the projection of the position of the particle on the circle. b. the projection along the diameter of the velocity of the particle on the circle. c. the projection along the diameter of tangential acceleration of the particle on the circle. d. the projection along the diameter of centripetal acceleration of the particle on the circle. e. meaningful only when the particle moving in the circle also has a non-zero tangential acceleration.